function check() {
	document.location.href = checkBrowserVersion() ? "gittauhligcasting.htm" : "alert.html";
}

function checkBrowserVersion(){
	var browserName = navigator.appName;
	if (browserName.indexOf("Netscape") != -1){
		return checkNetscape();	
	}
	else if (browserName.indexOf("Internet Explorer") != -1){
		return checkIE();
	}
	else {
		return true;
	}
}

function checkNetscape() {
	var browserVersion = parseInt(navigator.appVersion);
	return browserVersion>=5;
}

function checkIE() {
	var version = getIEVersion();
	return version >= 5.5;
}

function getIEVersion() {
	var re = /^Mozilla\/4\.0 \(compatible; MSIE (\d\.\d)/g;
	var agent = navigator.userAgent;
	var version = re.exec(agent); 
	if (version && version.length == 2) {
		//alert(version[1]);
		return parseFloat(version[1]);	
	}
	else {
		return -1;
	}
}